Valve



July 19, 1927.

w. B. GRIFFITH VALVE me@ June 19, y1922 ALJ- M @IQ m M IN VEN TOR A TTORNE Y l Il...

Patented July 19, 1927.

UNITED @STATES EISIT'y opi-Fie WILLIAMB. GRIFFITH, or rnrmmrnu, musznvnnu', mignon. To sun srnrmnn conromrmnr, n camareros or Nxw nnen.

il i 4,vermi Application med June 1e, 1922. semi no. 569,349.

My invention relates to improvements inY valves, particularly 'valves' adapted for use in sprinkler systems requiring a valve, known@ as a d ry pipe valve,liaving a Water valve and an air valve of larger area than the Water valve, whereby-a' lovv air pressureconfined in the .systemvvill'liold the Water valve closed against a higher Water pressure; and

` whenrtliefair 4pressureis relieved bythe opening ola sprinkler head, the valve will o en and'allovv the, Water to pass'through tfe'system. Valves of this general typeare i, Wellknownfin'the art. 'Y i Myil fentionalso relates to various im-V the-valve member byv clamp ring extend-rv ing under the" periphery of the water valve, .thus limiting the rookingmoveinent. of thel olapper valve uponthe spherical ,center boss, or bearin- `membeno the valve member.; a' lfurtlier oject of my `invention isY to'posi- 'tion tlieair valve eocentrically in relation to the `Water valve, whereby the air valve will be located a greater y distance lfrom .the `pivot point-of the valve member than the` water valve, ,by which arrangement the air valve mayexert a relilltively` greater pressure upon the Water valve, .due tothe di'erence iniftliefleverage 'between theair valve and ithe vvaterivalve in relation to the shaft, on

1which `saidvalves lare pivotally mountedf g Referring -to the `a ;compimying drawing: F lis a vertical sectional view ofavalve Showing my invention embodied therein.; Fig: 2 is an inverted plan view .of the clapper carrier, detached, showing the Water and air' valves mounted thereon, andjdrawn on a smaller scale; l f

y Inv the acooinpanyingidrawings, in whieh, like reference `chi'inietersreferto like parte,

represents the valve body or easing provided with a Waterinlet pipe 2 .and an outlet i pipe 3, said pipes having suitable flanges 4 and 5 thereonfor making pipe connection.

The Ainlet pipe 2 extends `into the interior of the easing 1, and its innerl end is provided vvith a nozzle?, having a waterlvalve seat 8 formed thereon, which extend-sat' an oblique an 1e in relatiollto the, longtudi? lia-1 axis of t inner en'd of thev nozzle Z, abovetlie line a--a, is cylindrealto faolitatein machining rthe parts;"below the line o o vthe nozzle ',7` is onioal, as is also theinletpip/fi 2 between ,nozzle and the Hangs 4. A nturi tube is thusformed bythe ,conical formation of the inlet portion o the,r nozzle 7, whereby the elliptifpipe2 and by the lowereoneal' e inlet pipe 2.v `The .extreme i cai opening onthe plane ofthe oblique valve t; seat 8 may be made equal in area to theY areaof the ofi-'the its largerend, adjacent to the a the "water whenseafe y l iS no l eaterlt an the pressurewouldhe .if the ve Ye 10 :were positionedxon a plane extendi 'at right angles to they longitudinal axis'o the in et pi e 2, at thel plane of the greatest'dlem'eter o .heinletpipe The ad` nge 4,-' thus 'vantage of the Venturi tb 1S, that' the air valve12 and the Water valve`10, mounted upon the'valve member 14 may be positioned obli nelly and thus gaine better balancing of t4 weight of the valves and the' valve member 14; Furthermore the Water valve 10 andthe `air valve 12 ma `be made smaller in area due to the cylin roal portion ofthe nozzle Y being smaller in diameter thanV the diameter fof. the inlet pipe-2 at its larger end. The valve seat 8 which is elliptieal in formation, due to thel .oblique angle at vvhiieliv it is positioned onthe nozzle 7, will not have a greater sectional area than,'tlie inlet pipe atits larger end, When jthe water inlet pipe 2.at

rassure against 'the ,Valve 10', upon 'the oblique valveseat .8,

sof

1 valve 10 Ais open, .the new of'water 'Will'fbe i aecelerated aait passes through the Venturi tube, therefore eifeotive `capacity of the water Supply p'ipeis not diminished by the slightly vredueed diameter of( the nozzle.-

The hinged rvalve member 14veonsists`of a i formed integally therewith arms 17 and 18 having. portions extending at approximately disk `forming an .air valve head '16 having' Y l los rightan'gles to the plane ofthe head 16,

arms 17 and 18Y ofthe valve member from strains tending to throw the valve member out of proper alignment When the valve isthrown open against the casing 1. 4 y

The head 16 forming partoi the valve member, carries the airval've ring 12, preterably ot rubber, having its outer edge projecting beyond the periphery of the head 16. The inner edge of the ring 12 is clamped in a groove formed in the under surface oit' the head 16, by a clamp 'ring 24, which is secured to lthe head 16 by fastening devices 25. The air valve ring 12 isv adapted to close upon the air valve seat upon a web 27 'forming part of the casing 1, The air valve seat 26 is positioned inap'proxiinately the same plane as the Water valveseat'f on the nozzle 7. i y

The Water clappe-r valve 10 is loosely mounted upon the under tace of the"Y head 16. The'center or the clapper lOvis provided with a spherical depression 29 into lwhich fits a spherical lug 30 formed upon" the head 16, which lug 30 toi-ms a rounded bearing part which tends to toreethe clapper 10 against the valve seat S. The olappler 1() is provided With an outwardly extendiiigfannular flange 32 which is adapted to take against fthe Yinvvardly extending `lugs ABiiioi-nied upon the inner edge otl tlielclampring 241." Saidflug's 33 loosely retain the clapper V 10 upon the head 16, permitting the clapper to have a slight rocking movement andalso'a free rotary movement upon the rounded Vbearing` part 80, Whercbythe clappei will always close properly upon the Water valveseat 8. The iacing surface 35, of the clapper y10 is concentric with the boss 30 and it-"isl sutiicient in Width to Coverall parts of the elliptical valve seat 8 regardless of the radial position ot the clapper 10. n,

rlllie air valve seat 26 is positioned eccentrically in relation to the Watervalve seat 8. The air valvering 12 and the Water clapper valve 10 are correspondinglyl positioned upon p the head 16 of the valve memberr 141. By .this 4arrangenientthe center of'tlieivater elapper valve 10 is closer to the pivot 'shaft' 19 than isi-the center of the lieadf16carrying the air valve ring 12.` `Then tlicl system contains `air under pressure above tliefliead `16aiid Water pressure beloiv the val'velO, the pivot shaft 19 will act as a tu'lcrum, and, asthe head 16, carrying vthe an" valve ring i12, is

llocated a greater distai'icetroni' the pivot shaft 19 than tlieivater clapper valve 10,- the air valve 12 will have a greater leverage than the-Water clappefrvalve 10. The result is that a lower air pressure above the air than the center ofthe air valve.

valve 12 Will be required to hold the Water valve 10 closed than would be required if the two valves Werepositioned concentrically; the Water pressure below the Water valve clapper 10 being constant.

The clamp ring 24 is provided with an opening 3i' into which projects an arm 38 o1 the pivoted latch member 39, adapted to hold the drip valve 40, open, when the valve member 11 is in the closed position. Said ring'21 is also provided With an enlarfred boss-11 which rests upon the arm 38 Wien they projection 12, on the clamp ring 24, iorces the. arm 38 into the position shown in dotted lines Figure 1. VWhen in the position shown Vin dotted lines the arm '38 prevents tlie valves 10 `and 26 from reseating.

I claim as my invention:

l.` In a valve, a Casin provided with an4 inlet passage, and an out et passage, a Water valve seat surrounding the discharge end of the inlet passage andan air valve seatA of largery diameter than the Water valve Seat surrounding the Water valve seat,a valve member pivoted to the casing provided With an air valve headl and a bearing part, a valve ring mounted upon the periphery ofsaid headadaptedto engage said air valve seat, a valve clapper adapted to engage said Water valve seat, said valve clap er having an outvvardl y extending annular iiange upon its' periphery and a centrally located socket into which said bearing part extends, ya. clamp ring secured to said head, said clamp ring positioned upon said headbetvveen said valve clipper and said valve ring, said clamp ring having a clamping surface formed upon the outer periphery lthereof adapted to engage said valve ring,'and said clamp `ring having an inner, edge portion adapted to loosely engage the periphery ofsaid` valve clap'per for limiting the movement `ofthe clapper rel'ativelyvto said head,

2. ln a valve, a casing provided with an inlet` passage and an outlet passage'and 'having a VWater-valve seat surrounding the discharge end of the inlet passage and an airy valve seat surrounding the Water valve seat, a valve member pivoted to the casing, an air valve upon the valve member adapted to air valveand saidV Water'valve positioned in member in relation to said air valve with the center oi the Water valve nearer to said pivot In a valve,V a casingv provided with an inlet passage and an outlet passage and having a Water-valve seat surrounding the 'discharge end of the inlet passage and an 'air-valve seat surrounding the Water-'valve seat, al valve member pivoted to the casing rengage said airevalve seat, and a Water valve .i :loosely mounted upon the valve member fac apted to engage said water-valve seat, said and provided with an air `valve head and a bearing part, a valve ring carried by said head and adapted to engage said air-valve seat, a valve clapper adapted to engage said Water-valve seat and havingr a socket into which said bearing part extends, and means to retain the bearing part Within the socket, said air valve and said Water valve being positioned in approximately parallel planes,v

said bearing part and said clapper being eccentric to said valve ring and nearer to the pivot of said member than the center of the valve ring.

4. In a valve, a casing provided with an inlet passage and an outlet passage and having a Water-valve seat surrounding therdischarge end of the inlet assage and an airvalve seat surrounding tiie water-valve seat, said valve seats bein positioned in approximately the same pmesya valve member pivoted to the casing and provided with a round air-valve head havinga valve ring adapted to engage said air-valve seat, and a round valve clapper eccentric to said valve head and having its center nearer to the pivot of said member than the center of said head and being adapted t0 engage saidV 

